I have 4 vacuum hoses that are plugged off. THey look to be coming from the carburators(not sure tho) one of them has a T that has a hose missing. Does anyone know where the T is supposed to go? The bike seems to run fine like it is, and when I plug it with my finger I can feel the vacuum and it doesnt change teh way it runs. Any help would be appreiated.

 

The 4 hoses are for carb syncing.The hose that is T'd on the #4 carb goes to the pair valve towards the valve cover. This valve injects air into your exhaust to reduce emmissions. These valves can be left disconnected and many are because they go bad. You need to make sure though that all of those 4 hoses are capped off. You may have not noticed anything at idle but I'm almost sure it is affecting performance somehow. I removed the pair valve and the reeds that are in the valve cover on my F4.
If you need more info on it I think I started a thread about the pair valve or just pm me.

 

the service manual has good pics of the all the routes of the vacum hoses and the locations